Observational constraints on the curvaton model of inflation

Abstract

Simple curvaton models can generate a mixture of of correlated primordial adiabatic and isocurvature perturbations. The baryon and cold dark matter isocurvature modes differ only by an observationally null mode in which the two perturbations almost exactly compensate, and therefore have proportional effects at linear order. We discuss the CMB anisotropy in general mixed models, and give a simple approximate analytic result for the large scale CMB anisotropy. Working numerically we use the latest WMAP observations and a variety of other data to constrain the curvaton model. We find that models with an isocurvature contribution are not favored relative to simple purely adiabatic models. However a significant primordial totally correlated baryon isocurvature perturbation is not ruled out. Certain classes of curvaton model are thereby ruled out, other classes predict enough non-Gaussianity to be detectable by the Planck satellite. In the appendices we review the relevant equations in the covariant formulation and give series solutions for the radiation dominated era.

Minor changes and corrections to match version accepted by PRD

References in corpus (7)

• Large-scale curvature and entropy perturbations for multiple interacting fluids
• Adiabatic density perturbations and matter generation from the MSSM
• Correlation-consistency cartography of the double inflation landscape
• The curvaton scenario in supersymmetric theories
• CMB Anisotropy from Baryogenesis by a Scalar Field
• Large Scale Structure from the Higgs fields of the Supersymmetric Standard Model
• The cosmological constant and general isocurvature initial conditions

Cited by in corpus (119)

• Planck 2015 results. XIII. Cosmological parameters
• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• Planck 2018 results. X. Constraints on inflation
• Weak Gravitational Lensing of the CMB
• Planck 2013 results. XXII. Constraints on inflation
• Inflation Dynamics and Reheating
• Cosmology and Fundamental Physics with the Euclid Satellite
• Cosmology and fundamental physics with the Euclid satellite
• CMB-S4 Science Case, Reference Design, and Project Plan
• Applications of Bayesian model selection to cosmological parameters
• Brane World Cosmology
• Review of local non-Gaussianity from multi-field inflation
• Cosmological Parameters from the 2003 flight of BOOMERANG
• The 21cm angular-power spectrum from the dark ages
• Conserved cosmological perturbations
• A Low CMB Quadrupole from Dark Energy Isocurvature Perturbations
• Non-linear isocurvature perturbations and non-Gaussianities
• Exploring Cosmic Origins with CORE: Inflation
• Massive Neutrinos and Magnetic Fields in the Early Universe
• Multiple field inflation
• Conserved non-linear quantities in cosmology
• The Curvaton as a Pseudo-Nambu-Goldstone Boson
• Constraining Isocurvature Initial Conditions with WMAP 3-year data
• The Observational Status of Cosmic Inflation after Planck
• Models of inflation liberated by the curvaton hypothesis
• Curvaton Dynamics
• CMB spectral distortions from small-scale isocurvature fluctuations
• Bounds on isocurvature perturbations from CMB and LSS data
• The Curvaton Web
• The CDM isocurvature perturbation in the curvaton scenario
• Bayesian model selection and isocurvature perturbations
• Correlated Primordial Perturbations in Light of CMB and LSS Data
• Constraints on a mixed inflaton and curvaton scenario for the generation of the curvature perturbation
• Can the curvaton paradigm accommodate a low inflation scale?
• The Peccei-Quinn Field as Curvaton
• Cosmological perturbations from varying masses and couplings
• Constraints on isocurvature models from the WMAP first-year data
• Correlated isocurvature perturbations from mixed inflaton-curvaton decay
• The initial conditions of the universe: how much isocurvature is allowed?
• Bounds on CDM and neutrino isocurvature perturbations from CMB and LSS data
• Squeezing the window on isocurvature modes with the Lyman-alpha forest
• Warm baryogenesis
• Compensated Isocurvature Perturbations and the Cosmic Microwave Background
• Predictions for Nongaussianity from Nonlocal Inflation
• Forecasted 21 cm constraints on compensated isocurvature perturbations
• WMAP, neutrino degeneracy and non-Gaussianity constraints on isocurvature perturbations in the curvaton model of inflation
• Curvatons in Supersymmetric Models
• Search for Compensated Isocurvature Perturbations with Planck Power Spectra
• Curvature and isocurvature perturbations in a three-fluid model of curvaton decay
• Baryons do trace dark matter 380,000 years after the big bang: Search for compensated isocurvature perturbations with WMAP 9-year data
• On Possible Variation in the Cosmological Baryon Fraction
• Gauge-Invariant Initial Conditions and Early Time Perturbations in Quintessence Universes
• MSSM Higgses as the source of reheating and all matter
• CMB anisotropies in the presence of a stochastic magnetic field
• Compensated isocurvature perturbations in the curvaton model
• Preheating curvature perturbations with a coupled curvaton
• Supersymmetric Curvatons and Phase-Induced Curvaton Fluctuations
• Probing correlated compensated isocurvature perturbations using scale-dependent galaxy bias
• Power Spectra Based Planck Constraints on Compensated Isocurvature, and Forecasts for LiteBIRD and CORE Space Missions
• Do baryons trace dark matter in the early universe?
• Responses of Halo Occupation Distributions: a new ingredient in the halo model & the impact on galaxy bias
• Constraints on scalar and tensor perturbations in phenomenological and two-field inflation models: Bayesian evidences for primordial isocurvature and tensor modes
• Warming up for Planck
• The effects of Non-Gaussian initial conditions on the structure and substructure of Cold Dark Matter halos
• Isocurvature perturbations in extra radiation
• Differentiating CDM and Baryon Isocurvature Models with 21 cm Fluctuations
• Optimizing future experimental probes of inflation
• Big Bang Nucleosynthesis Constraint on Baryonic Isocurvature Perturbations
• Conditions for a Successful Right-Handed Majorana Sneutrino Curvaton
• Cold Dark Matter Isocurvature Perturbations: Cosmological Constraints and Applications
• A spherically symmetric and stationary universe from a weak modification of general relativity
• Sneutrino condensate as a candidate for the hot big bang cosmology
• Non-Gaussianity in three fluid curvaton model
• Lensing Bias to CMB Measurements of Compensated Isocurvature Perturbations
• Curvaton Scenario with Affleck-Dine Baryogenesis
• Constraints on moduli cosmology from the production of dark matter and baryon isocurvature fluctuations
• The curvaton scenario in the MSSM and predictions for non-Gaussianity
• Cosmic microwave background polarization analysis
• Non-Gaussianity from Attractor Curvaton
• Suppressing Super-Horizon Curvature Perturbations?
• Compensated Isocurvature Perturbations in the Galaxy Power Spectrum
• BAO Modulation as a Probe of Compensated Isocurvature Perturbations
• Probing a panoply of curvaton-decay scenarios using CMB data
• Exploring compensated isocurvature perturbations with CMB spectral distortion anisotropies
• On the Effects due to a Decaying Cosmological Fluctuation
• Uncorrelated Compensated Isocurvature Perturbations from kSZ Tomography
• Probing new physics with multi-vacua quantum tunnelings beyond standard model through gravitational waves
• Particle Physics Approach to Dark Matter
• Right-handed neutrinos as the source of density perturbations
• Curvaton Potential Terms, Scale-Dependent Perturbation Spectra and Chaotic Initial Conditions
• Hubble induced mass after inflation in spectator field models
• An improved estimator for non-Gaussianity in cosmic microwave background observations
• Inflationary parameters and primordial perturbation spectra
• Probing vector chirality in the early Universe
• Cosmological Perturbations During Radion Stabilization
• Density perturbations from both the inflaton and the curvaton
• Isocurvature initial conditions for second order Boltzmann solvers
• The moduli problem at the perturbative level
• Cosmic perturbations, baryon asymmetry and dark matter from the minimal supersymmetric standard model
• Affleck-Dine baryogenesis in inflating curvaton scenario with O($10-10^2$TeV) mass moduli curvaton
• Magnetic Fields from Compensated Isocurvature Perturbations
• Axion-CMB Scenario in Supercooled Universe
• Lensing Bias to CMB Polarization Measurements of Compensated Isocurvature Perturbations
• Constraining the curvaton scenario
• A model of cosmology and particle physics at an intermediate scale
• Mixed perturbations from an Inflaton and Two Curvatons - towards understanding non-gaussianity in more complicated curvaton scenarios
• Curvaton decay into relativistic matter
• Constraints on the three-fluid model of curvaton decay
• QCD Axions and CMB Anisotropy
• Flat Direction Dynamics in a Non-Topological Soliton-Dominated Universe
• Non-linear effects in early Universe cosmology
• On the four-dimensional effective theories in brane-worlds
• The intrinsic bispectrum of the CMB from isocurvature initial conditions
• Inflationary study of non-Gaussianity using two-dimensional geometrical measures of CMB temperature maps
• Unified Origin of Curvature Perturbation and Baryon Asymmetry of the Universe
• Linearized Treatment of Scalar perturbations in the Asymptotic Cosmological Model
• Probing small-scale baryon and dark matter isocurvature perturbations with cosmic microwave background anisotropies
• Braneworld Baryogenesis and QCD-Era Magnetogenesis: A Predictive Link
• Searching for dark matter isocurvature initial conditions with N-body Simulations